Why can't I use the bevel equally on all my loopcuts? Double edge problems
I'm not sure to understand what's the method you're using, what are the problems you're encounting, etc, but if I had to do this kind of walls, I would make only one segment that I would repeat with the Array modifier to make things easier, and for the bricks, if you want to keep the whole thing as one unique object, you could:

Cut some orthogonal lines, bevel them:



Extrude them and bevel the extrusion (for example with a Bevel modifier with Limit Method &gt; Angle):



If you think that there's a problem with this kind of method, please tell me?